21550000

素因数分解:

$2^4\times 5^5\times {\mathrm{431}}^1$

素因数の和:464

約数の個数: 60

約数和(自身を含む): 52309152

約数和(自身を除く): 30759152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 431, 500, 625, 862, 1000, 1250, 1724, 2000, 2155, 2500, 3125, 3448, 4310, 5000, 6250, 6896, 8620, 10000, 10775, 12500, 17240, 21550, 25000, 34480, 43100, 50000, 53875, 86200, 107750, 172400, 215500, 269375, 431000, 538750, 862000, 1077500, 1346875, 2155000, 2693750, 4310000, 5387500, 10775000, 21550000]

約数ペア:

[(1, 21550000), (2, 10775000), (4, 5387500), (5, 4310000), (8, 2693750), (10, 2155000), (16, 1346875), (20, 1077500), (25, 862000), (40, 538750), (50, 431000), (80, 269375), (100, 215500), (125, 172400), (200, 107750), (250, 86200), (400, 53875), (431, 50000), (500, 43100), (625, 34480), (862, 25000), (1000, 21550), (1250, 17240), (1724, 12500), (2000, 10775), (2155, 10000), (2500, 8620), (3125, 6896), (3448, 6250), (4310, 5000)]